That was great mate brilliant, it's no easy task doing a clutch change on your back on the drive , modern cars can be an absolute mare to work on aswell. I think you did really well .
It will go just make sure it’s clean around the area and from burrs of metal, grease it would help . It might be better with another pair of hands. One pushing the arm down as much as possible, then line the hub up to it. It needs to be precise. Tap it lightly to help it if it’s not going in. The bolts will need tapping in too, just make sure you don’t damage the thread.